Berlin 2005 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

SYQL: Measurements at the Quantum Limit

SYQL 1: SYQL

SYQL 1.1: Hauptvortrag

Freitag, 4. März 2005, 10:15–11:00, TU HE101

Single Spin Detection by Magnetic Resonance Force Microscopy — •Daniel Rugar, H. J. Mamin, R. Budakian, and B. W. Chui — IBM Research Division, Almaden Research Center, San Jose, CA 95120 USA

Single-spin detection by magnetic resonance force microscopy (MRFM) is based on the detection of the attonewton magnetic force between a spin and a nearby magnetic tip. Interest in the technique is driven by potential applications to three-dimensional atomic resolution imaging and by fundamental interest in the detection and manipulation of individual quantum objects. This talk describes the basic principles of MRFM and recent results that have demonstrated the ability to detect an individual electron spin buried below the surface of a silicon dioxide sample. Various innovations that led to single spin detection will be described, including ultrasensitive force detection, spin-friendly micromechanical cantilevers and methods to measure and control statistical polarization in small spin ensembles. Future prospects for quantum state readout and for extension to nuclear spin detection will be discussed.

D. Rugar, R. Budakian, H. J. Mamin, and B. W. Chui, Nature 430, 329 (2004).
Ch. Day, Phys. Today 57 (9), 21 (2004).